Facing machine for valves and timers



G. N. KROUSE FACING MACHINE FOR VALVES AND TIMERS Jan. 17, 1928.

- INVENTOR. GLENN. KROUSE Mv/J 44 ATTORNEY.

Patented Jan. 17, 1928.

if UNITED QSTAFTESII PATENT OFFICE.

GLEN N. xaovsn, or VALPARAISO, INDIANA.

FACING MACHINE FOR VALVES AND TIMERS.

application filed March is, 1927. Serial No. 175,741.

My invention relates to an improved de a vice for facing the. contacts of. tlmbers emloyed, for example, on motor vehicles and or also facing the valves of internal combustion motors. My improved facing machineis intended primarily to permit anyone owning a motor vehicle or having occasion from time to time to face timers and valves, to have a device that will do this work simply and effectively, and this I accomplish by constructing the device in a simple manner for hand operation, so that the same machine w-ill face a timer and valves of different sizes, without requiring a large number of expensive parts to secure the intended result. My improved facing machine is applicable particularly to standard timers used on Ford motor vehicles and to face the valves of the different sizes used in Ford passenger cars and tractors, although the same kind of construction and operation may be employed with any timers of the same general design and with valves of any size and kind.

My invention will best be understood by reference to the accompanying drawings showing a preferred embodiment thereof in which Fig. 1 is a vertical, central, sectional view through the cutter shaft of the device, and shows a timer shell in place on the device,

Fig. 2 shows in a view similar to Fig. 1 a valve in position for facing and the auxiliary cutter used for that purpose,

. Fig. 3 is a sectional View of the parts shown in Fig. 2 taken along theline 33,

with the valve removed, and

Fig. 4 is a sectional view to an enlarged. scale, of the cutter head shown in Fig. 1 taken along the line 44.

Similar numerals refer to similar parts throughout the several views.

As shown 1n Fig. 1 my device consists of a frame having two bearings 11, 11 toreceive a rotary hollow shaft 12 which has rigidly secured to one end a cutter head 13 adjacent a work supporting face 14 perpendicular to the axis of theshaft 12. The

cutter head 13 has extending laterally through it, a hole for receiving a cutter bar 15, the lower end of which is provided with a cutting edge 16. Asindicated in Flg. 4,

the cutter bar 15 is slotted from its upper end to a point adjacent the inserted cutter po nt 16, to receive the fiat wedge shaped and it of arod is xtending through the.

by a wing nut 19.. .Around the cutter bar 15 between vthecutter head 13 and a pin extendingthrough the upper end of the cutter bar, a spring 21 is disposed, pressing the cutter bar upwardly against. the lower inclined surface of the wedge17. As a result .of this, the spring 21 tends to move the cutter point 16 away. from the work, as far as the wedge 17 will permit, and to secure a desired amount of cutting action, the nut 19 is turned relativelyto the shaft 12, until the wedge 17 forcesthe cutter bar 15 towards .the work enough to take the desired cut when the shaft 12 is rotated. A handle 22 is secured to the outer end of the shaft 12 by a clamping bolt 23 to rotate the shaft 12 as desired.

shaft 12 and'havin'g a threaded end engaged To conveniently center a timing shell 24 coaxially with the axis ofthe shaft 12, the face 14 is provided wlth shouldered grooves 25, substant-iallyfitting the edge of the timer shell. A yoke 26 extends around the shell 24 to hold it in place-in. the grooves 25, the ends of the yoke extending as indicated in Fig. 3, through opposite sides of the face 14 of the frame, where they are engaged by 1 thumb nuts 27 It will be observed that the shaft 12 is longer than the overallidimension of the bearings 11, 11 and this permits sufficient axial motion of the shaft to move the cutter entirely across the contacts of the timer durthecutter across the face of the timer contacts. By usinga little care in the operation and taking a light cut each time, the timer contacts may readily be faced with quite as good resultsas could be secured in a power machine. I find it convenient .to produce 1 the requisite friction on theshaft 12, by means of a flatspring 28 securedto a web 29 ofthe. frame and resting with a small amount of'spring action against the side of the shaft 12 between the bearings 11,11.

As indicated in Fig. 3, I prefer to cut away the face ll as indicated at 30, 30, to

provide sight openings to inspect the inside of the timer shell during a facing operation, to the end that the shell need not be removed from the device until the facing is completed. To conveniently support the machine, I extend the frame into jaws 31, 32, through the lower one of which I extend a clamping screw 33 so that any desired supporting surface may readily be clampedbetween the jilWSl and the screwBd.

Referring to Fig. it will beobserved that besides the bearings'll, 11, other bearings 3'1 and 35 are provided in the frame, these bearings being in pairs as indicated for the bearings 35 in Fi 2, to receivevalve stems ofdilferent size valves. Below the bearings 8st and 35, the face 14 is provided with an'aperture' 36 to receive .a Chuck &7, whichgin turnholds a cutter bar 38, ground at its end atthe proper angle to face the valve surface 39 of the valve carried by the valve stem 40. The valveetem 10 extends beyond the bearings 35 and is engaged by a second aperture in the handle 2' which is clamped to the valve stem by thclclarnping bolt 23, it being understood. that the handle is split suiliciently so that the single clamping screw 23 will clamp either the shaft 12 or a valve stem as desired. By rotating the valve for the relation of the parts indicated iir'Fig. 2, by means of the handle 22, the

walveflfaee 39 may be faced by the cutter 38 sozthat a true valve surface is again. had,

after the valve has become worn in use. The facing or truing of a valve of different size mounted in the pair of bearings is similarly accomplished. I find it convenient to shape the web 41 so .that its outer edge con sists of plane surfaces 42and 43 intersectlng I each other at the angle to which the end of the cutter 38 should be ground relatively to the sideof'the cutter, and said plane surfaces my facing machine provides a convenient means for accomplishing the intended results, that the only parts required to ,face the valves in addition to facing the timers, are

the chuck and the cutteiflbar carried by it,

' and that the machine may conveniently be constructed to face valves of different kinds and sizes. Furthermore my machlne is mexpensivein construction andatfords a ready means for avoiding the delays and expense incident to taking timer shells and valves to a place where power machinery is avallable for facing them.

While I have shown my invention in th particular QUIbOClliHOIIt above described, it

will be understood that I do not limit myself to this exact construction as I may employ equivalents known to the art at the time of the filing of this application without departcutter head carried by one end of said shaft and having a laterally extending hole-there- :through, a slotted cutter bar in said hole, a

feed bar extending through said shaft-and threaded at one endand at theother extending into an outwardly diverging wedgeportion' in the slot of said cutter bar, a feed-nut on the threaded end of said feed bar adjacent the end of said shaft, a handle on said'shaft for turning it, said frame having awork supporting face perpendicular to saidshaft adjacent said cutter head for receiving a timer shell, and clamping devices for bold ing a timershell on said face around said cutter head. I

2. In a facing machinefor valves and timers, the combination of a framehaving bearings, a tubular shaft rotary in-said bearings and movable longitudinallytherein, a cutter head carried by one end; -ofsaid shaft and having a laterally extending-hole ,t-heretlnough, a slotted cutter bar in said hole, a fcedbar extending through said shaft and threaded at one end and at the other extending into an outwardly diverging wedge portion in the slot of saidcutter bar,

a feed not on the threaded end of said feed ba adjacent the end of said shaft, a handle on said shaft for turning it, said i'ramehaving a work supporting-face perpendicular to said shaft adjacent said cutter head for receiving a timer shell, clamping devices for holding a timer shell on said face around said cutter head, and friction means restraining said shaft against freemovement.

3. In a facing machine for valves-and timers, the combination of aframe having bearings, a tubular shaft rotary' in said bearings'and movable longitudinally therein, a cutter head carried by one endof said shaft and having a laterally extending hole therethrough, a slotted cutter bar in sa'id hole, a

feed bar extendingthrongh said shaft and threaded at one endandat the other extending into an outwardly diverging wedge portion in the slot of said cutter bar, a feed nut on the threaded end of said feed bar adjacent the end of said shaft, a handle on said shaft for turning it, said frame having a work supporting face perpendicular to said 4. In a facing machine for valves and timers, the combination of a frame having bearings, a tubular shaft rotary in said bearings and movable longitudinally therein, a. cutter head carried by one end of said shaft and having a laterally extending hole therethrough, a slotted cutter bar in said hole, a

feed bar extending through said shaft and threaded at one end and'at the other extending into an outwardlydiverging wedge portion in the slot of said cutter bar, a feed nut on the threaded end of said feed bar adjacent the end of said shaft, a handle on said shaft for turning it, said frame having a work supporting face, perpendicular to said shaft adjacent said cutter head for re ceiving a timer shell, and clamping devices for holding a timer shell on said face around said cutter head, said face having a circular shoulder coaxial with said shaft for receiving and centering the edge of a timer shell.

i threaded at one end and at the other extending into an outwardly diverging wedge portion in the slot of said cutter bar, a feed nut on the threaded end of said feed bar adjacent to the end of said shaft, a handle on said shaft for turning it, said frame having a worksupporting face perpendicular to said shaft adjacent said cutter head for receiving a timer shell, and clamping devices for holding a timer-shell on said face around said cutter head, said face being cutaway to afford a sight opening permitting inspection of the interior of a timer shell during a facing operation.

6. In a facing machine for valves and timers, the combination of a frame havin bearings, a tubular shaft rotary in said bearings and movable longitudinally therein, a cutter head carried by one end of said shaft and having a laterally extending hole therethrough, a slotted cutter bar in said hole,

a feed bar extending through said shaft and threaded at one endand at the other extending into an outwardly diverging wedge portion in the slot of said cutter bar, a feed nut on the threaded end of said feed bar adjaeent the end of said shaft, a handle on said shaft for turning it, said frame having a work supporting face perpendicular to said shaft adjacent said cutter head for receiving a timer shell, clamping devices for holding a timer shell on said face around said cutter head, said frame having extending jaws below said face, and a clamping screw through one of said jaws for clamping a supporting member against the other of said jaws.

7. In a facing machine for valves and timers, the combination of a frame having bearings, a tubular shaft rotary in said bearings' and movable longitudinally therein, a cutter head carried by one end of said shaft and having a laterally extending hole therethrough,a slotted cutter barin said hole, a

feed bar extending through said shaft and threaded at one end and at the other extending into an outwardly diverging wedge portion in the slot of said cutter bar, a feed nut on the threaded end of said feed bar adj acent the end of said shaft, a handle on said shaft for turning it, said frame having a work supporting face per endfcular to said shaft adjacent said cutter ead for receiving a timer shell, clamping devices for holding a timer shell on said face around said cutter head, a spring retainer 011 the slotted end of said cutter bar, and a spring between said retainer and said head holding said cutter'bar against said wedge portion.

In witness whereof, I hereunto subscribe my name this 12th day of March, A. D. 1927.

a i GLEN N. KROUSE. 

